Dave... I am looking at a mono CCD camera right now, using narrowband filters. I'm moving back to Toronto from the country next week, and this is the obvious solution to light pollution. The dark skies here are pretty good, but from mid-town Toronto one is lucky to be able to see Vega on a clear night. Narrowband DSOs are the ticket.
The Pentax is turning out to be the first steps. Next it's an new OTA and cooled mono camera. It never stops.
My plan is to make the whole system remotable, so that after setup on my balcony I can work from my desk.
Working outside in -10C temperatures sucks.
Michael
Enjoyable article Michael. Astroimaging is one of the most difficult and taxing forms of imaging but is also very pleasing when it all works well. Narrowband is a whole different beast and because of the small amounts of light being gathered per exposure is very demanding on the mount as I am sure you are aware. When I do narrowband imaging I am typically taking 20-30 minute exposures to get the S/N up. A whole other world of color balance and interpretation.
A utility that may help in determining correct color balance, if you so desire and it will work with the data, it calculates the color based on looking up the photometry data available for the star field and determines the color balance based on those values. Sometimes it is useful to see colors and sometimes to it is good to do one's own interpretations. The utility is free, located here:
http://bf-astro.com/excalibrator/excalibrator.htmIt requires you to plate solve but there are ways of doing that online, and it requires the ability to separate the color planes, which Nebulosity can also do.
Another stacking program which I find quite good is CCDStack, it has some sophisticated alignment routines and data rejection for outliers. And of course there is Pixinsight which has an exceedingly high learning curve but I have found really can remove color gradients very well. It is discussed in the other raw converters forum here.
A quick way of determining exact location and what other major objects may be in your field of view is to post the the image to Flickr, and then add it to the group, astrometry and they will do a blind plate solve, scroll down below the image and you can see the results:
https://flic.kr/p/ad2aud You can also click on the see in world wide telescope to see it plotted on a sky chart.
Enjoy and looking forward to more of your astro adventures.
Alan